| Cosolvent Effect on the Tautomerism of Ethyl Acetoacetate in Supercritical CO_2 |
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| 作者姓名： | Hong Ping LI Hai Fei ZHANG Jun LIU Bu Xing HAN* Center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing |
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| 作者单位： | Hong Ping LI，Hai Fei ZHANG，Jun LIU，Bu Xing HAN* Center for Molecular Sciences，Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080 |
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| 基金项目： | This work was financially support by National Basic Research Project(G2000048010). |
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| 摘 要： | There are some unique advantages for chemical reactions in SCFs. For example, reaction rates, yields, and selectivity can be tuned by pressure or small amount of cosolvent. SCFs can be used to replace environmentally undesirable solvents. It is not surprised that in recent years the use of SCFs as solvents for chemical reaction media has received much attention. However, mechanism for the effect of pressure and cosolvents on chemical reactions is not very clear. Tautomeric reactions are id…
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Cosolvent Effect on the Tautomerism of Ethyl Acetoacetate in Supercritical CO_2 |
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| Hong Ping LI,Hai Fei ZHANG,Jun LIU,Bu Xing HAN* Center for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing .Cosolvent Effect on the Tautomerism of Ethyl Acetoacetate in Supercritical CO_2[J].Chinese Chemical Letters,2001(4). |
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| Authors: | Hong Ping LI Hai Fei ZHANG Jun LIU Bu Xing HAN Center for Molecular Sciences |
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| Institution: | Hong Ping LI,Hai Fei ZHANG,Jun LIU,Bu Xing HAN* Center for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 |
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| Abstract: | The effect of cosolvent cyclohexane, chloroform, and acetonitrile on the keto-enol tautomeric equilibrium of ethyl acetoacetate in supercritical CO2 was studied by UV-Vis spectroscopy over the pressure range from 76 to 110 bar at 308.15 K. It was found that the equilibrium constant decreases with increasing polarity of the cosolvents. |
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| Keywords: | Supercritical CO2 cosolvent effect ethyl acetoacetate tautomerism |
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